iGaging Digital Readout DRO EZ-Depth for Drill Press - Precision Depth Measurement Tool for Woodworking & Metalworking Projects

This is an incredible upgrade for my cheap benchtop Ryobi drill press! It was relatively simple to install (if you're well equipped in the fabrication tools department), it's VERY accurate and VERY repeatable. Both accuracy and repeatability will be directly related to how well you install it. I'll be using it in conjunction with the Ryobi's budget depth stop.The hardware is M3 metric. The included tap, which was rattling around in a bag of steel screws and brackets, was damaged and dull, the drill bit was also dull. I used a 4-40 tap, and 4-40 screws to secure the supplied bracket to the drill press casting. The supplied tap (junk) has a very small square tang; consider this, you may want to order a GENERAL #164 TAP HANDLE if you intend to use the supplied tap.The brackets are hardened steel, light but stiff, and adequate.The instructions were enlightening, given that your installation will likely be "custom".The DRO rail HAS to be square and straight to the brackets and the quill movement. This was easy enough by eyeball, just tighten the hardware in sequence while running the quill up and down for a small degree of self-alignment. My quill has a rubber ring at the top to soften the impact of the quill coming home. Being rubber, it causes +/- .001" deviation in the home "zero" position.I am absolutely thrilled with the install-ability and performance of this DRO. I build guitars, and boring .050" deep pocket holes for pearl fret markers is always a PIA with this Ryobi, but will be a piece of cake now. This is a fantastic and affordable upgrade. I would buy again, recommend to friends and even give as a gift.